Valve To Camshaft Clearances 1 Exhaust Too Big

[Kccv23highliftcam]

Great thread people.

[Penelope Stopit]

I put my Micrometer to work earlier and have calculated what size shims I need to get the valve clearances very close to what Mignon has recommended
If someone has the following shims please post here

1 x 0906 52 01EP 2,875

1 x 0906 82 01EP 2,9

1 x 0906 53 01EP 2,950

2 x 0906 84 01EP 2,975

1 x 0906 54 01EP 3,025

1 x 0907 07 01EP 3,05

[Mignon]

As I said in my original post with a link to aftermarket shims they come in 0.05mm increments not 0.025mm increments but I have plenty in every size of 2.85, 2.90, 2.95, 3.00, 3.05. Obviously there's some manufacturing tolerance and you can often find ones a bit bigger or smaller than nominal and of course you can rub them down on wet and dry paper if need be but 0.05mm increments is good enough to get valve clearances in spec.

I'm surprised you need 7 sizes to get 8 valves right and only 1 could be reused.

I would suggest then you need 2 x 2.90 mm, 1 x 2.95 mm, 2 x 3.00 mm and 2 x 3.05 mm. Will that do you?

[Mignon]

Looking at your original post you already have 2 inlets at 0.2mm clearance and 1 exhaust at 0.3mm which are all spot on so how the hell do you need 7 new shims when only 5 clearances need changing?

[Penelope Stopit]

Mignon said:

Looking at your original post you already have 2 inlets at 0.2mm clearance and 1 exhaust at 0.3mm which are all spot on so how the hell do you need 7 new shims when only 5 clearances need changing?

I re-measured before removing the camshaft and spent more time to be as accurate as I could be

First measurements were

1 Inlet 10 Minimum
2 Exhaust 30 Bang on
3 Exhaust 35 Maximum
4 inlet 15 Bang On
5 Inlet 20 Maximum
6 Exhaust 35 Maximum
7 Exhaust 40 **********XXXXX*************
8 Inlet 20 Maximum

Re-measuring

1 Inlet 10
2 Exhaust 35
3 Exhaust 35
4 Inlet 15
5 Inlet 25
6 Exhaust 35
7 Exhaust 40
8 Inlet 20

I can get within 0.02 of the aimed for tolerances for 4 valves by re-using what I've taken out and swapping them about and 1 valve is dead on

What I'm left with is 3 valves needing shims that I can't get close to as 2 of them need to be bigger than what I have left and I would need to rub one shim down by 0.1 for the other and I don't want to do that unless I have to

The following sizes will make a real good job of it all

1 x 0906 52 01EP 2,875

1 x 0906 82 01EP 2,9

1 x 0906 53 01EP 2,950

2 x 0906 84 01EP 2,975

1 x 0906 54 01EP 3,025

1 x 0907 07 01EP 3,05

But......if you know that getting within 0.02 of your earlier given figures is good enough then they are good enough for me
In which case, I need as close as possible to the following

2 x 2.98

1 x 2.91

I cant find the shims at this website https://www.enginepartsuk.net/camshafts-followers-...

A Google search for A E Auto parts sent me to here https://www.enginepartsuk.net/ae

When I search for shims at the above website I'm not getting a result, there is no big list of shim sizes and prices

Thanks for your time

What do you suggest?

I can't reply back to anything that you post tonight as it is later here and I am wrecked, I will visit back early in the morning

[Old Merc]

Penelope Stopit said:

Mignon said:

The shims for the XUD are the same as for the petrol XU5 and XU9 models. 13.42mm diameter available in 0.05mm thickness increments, they locate in the valve spring cap under the lifter bucket. They are readily available from motor factors like Ferraris, AE Autoparts in packs of 4. It's been 10 years since I last bought any but they were only about £1 plus Vat to the trade per pack with 50% trade discount. Probably £3 to a punter by now. They're a fortune from a main stealer of course so don't even think of going there. I've seen £11 per single shim from them back in the day.

I've built dozens of these in my race engine building days and I recommend 0.2mm inlet and 0.3mm exhaust clearances. Stone cold obviously.

I'd be more worried about the inlet with only 0.1mm clearance than the exhaust with 0.4mm. In fact 0.4mm was the recommended clearance for the petrol models on the exhaust but it's the same valve location design in the diesel with the same thermal expansion considerations.

https://www.enginepartsuk.net/sites/default/files/...

Page 237.

Set pistons to half way down the bores. Mark camshaft orientation with tippex. Remove cam caps evenly and be very sure not to get them mixed up as to where they go back or which way round!!! Fit one wrong and you'll snap it when you tighten the nuts down and the head is scrap as the caps are unique to each head and can't be replaced. Take a photo first and note the numbers stamped into the caps. Remove lifter buckets and shims with a magnet and keep them all in the correct order. Calculate new shim thicknesses required and make a list of what you need. Rebuild and recheck clearances. Easy job. Any Citreon/Peugeot engine builder or reconditioner will have a big box of the things and might swap you for the sizes you need for beer money. I have a box of every size somewhere if I can still find it.

Thank you for all this information and your time spent looking for shims, on Saturday I will be going out on a shim search and taking the shims diameter measurement with me (Thanks again I was desperate for that diameter figure). I have been spoilt for choice in the past when working on engines in the UK, having moved on I now find myself struggling for the most simple of parts, I may break lucky on Saturday but am not banking on it, I don't want to be creating work for you but will contact you here if I am in deep trouble getting the replacement shims, I very much appreciate your offer

Working to your shared knowledge and experience I will be throwing the Peugeot tolerances out the door.... Inlets 15 +/- 5....Exhausts 30 +/- 5 and shimming the Inlets to 0.2mm and the exhausts to 0.3mm

I will take your instructions with me when I head off to remove the camshaft, I knew nothing about the cylinder head being a scrapper if a cap is damaged

Oops Sorry - the recipient doesn't permit emails

If I am stuck I won't be able to email you due to you not allowing emails

I`ve only just noticed this thread. I have a complete assortment of Peugeot XU shims,probably three or four of every size available. All labeled in a Worth box. I used to have my own Peugeot repair workshop. Now I`m retired they are available for sale. PM me if you want. I`ve also got a couple of recon XU Petrol heads.

[Penelope Stopit]

Sardonicus said:

Penelope Stopit said:

There are no shims to be had here, people are grinding the valve stems to get the clearances, I was shocked when witnessing the grinding method
I am now waiting for the delivery of a Micrometer, there are no sizes marked on the shims fitted

Just see this post, XUD engines in my past experience never open/loosen valve clearances in use mileage etc a trait or robustness of bucket and shim system if you like the preferred valve gear on high revving motorcyle engines for good reason however they do close up with big mileages causing cold non-start issues (cured a few of those) shimming in situ is easy, my point is let me know what sizes you want and I will mike-em up and i'll send them to you not seen daylight for years at my workshop bless em got st loads of new old stock Triumph Stag ones too some one gave me many many moons ago

Edited by Sardonicus on Friday 25th May 09:15

Thank you Sardonicus for sorting out some shims for me

[Penelope Stopit]

Old Merc said:

I`ve only just noticed this thread. I have a complete assortment of Peugeot XU shims,probably three or four of every size available. All labeled in a Worth box. I used to have my own Peugeot repair workshop. Now I`m retired they are available for sale. PM me if you want. I`ve also got a couple of recon XU Petrol heads.

I have emailed you through PH

[Old Merc]

Penelope Stopit said:

Old Merc said:

I`ve only just noticed this thread. I have a complete assortment of Peugeot XU shims,probably three or four of every size available. All labeled in a Worth box. I used to have my own Peugeot repair workshop. Now I`m retired they are available for sale. PM me if you want. I`ve also got a couple of recon XU Petrol heads.

I have emailed you through PH

I have replied to your private email address. Looking forward to hearing from you.